/* Copyright  (c) 2002 Graz University of Technology. All rights reserved.
 *
 * Redistribution and use in  source and binary forms, with or without 
 * modification, are permitted  provided that the following conditions are met:
 *
 * 1. Redistributions of  source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in  binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following acknowledgment:
 * 
 *    "This product includes software developed by IAIK of Graz University of
 *     Technology."
 * 
 *    Alternately, this acknowledgment may appear in the software itself, if 
 *    and wherever such third-party acknowledgments normally appear.
 *  
 * 4. The names "Graz University of Technology" and "IAIK of Graz University of
 *    Technology" must not be used to endorse or promote products derived from 
 *    this software without prior written permission.
 *  
 * 5. Products derived from this software may not be called 
 *    "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior 
 *    written permission of Graz University of Technology.
 *  
 *  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
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 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE
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 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY  OF SUCH DAMAGE.
 */

package iaik.pkcs.pkcs11.objects;




/**
 * Objects of this class represent a long attribute of an PKCS#11 object
 * as specified by PKCS#11.
 *
 * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
 * @version 1.0
 * @invariants
 */
public class LongAttribute extends Attribute {

  /**
   * Default constructor - only for internal use in AttributeArrayAttribute.getValueString().
   */
  LongAttribute() {
  	super();
  }
  
  /**
   * Constructor taking the PKCS#11 type of the attribute.
   *
   * @param type The PKCS'11 type of this attribute; e.g.
   *             PKCS11Constants.CKA_VALUE_LEN.
   * @preconditions (type <> null)
   * @postconditions
   */
  public LongAttribute(Long type) {
    super(type);
  }

  /**
   * Set the long value of this attribute. Null, is also valid.
   * A call to this method sets the present flag to true.
   *
   * @param value The long value to set. May be null.
   * @preconditions
   * @postconditions
   */
  public void setLongValue(Long value) {
    ckAttribute_.pValue = value;
    present_ = true;
  }

  /**
   * Get the long value of this attribute. Null, is also possible.
   *
   * @return The long value of this attribute or null.
   * @preconditions
   * @postconditions
   */
  public Long getLongValue() {
    return (Long) ckAttribute_.pValue ;
  }

  /**
   * Get a string representation of the value of this attribute. The radix
   * for the presentation can be specified; e.g. 16 for hex, 10 for decimal.
   *
   * @param radix The radix for the representation of the value.
   * @return A string representation of the value of this attribute.
   * @preconditions
   * @postconditions (result <> null)
   */
  protected String getValueString(int radix) {
    String valueString;

    if ((ckAttribute_ != null) && (ckAttribute_.pValue != null)) {
      valueString = Long.toString(((Long) ckAttribute_.pValue).longValue(), radix);
    } else {
      valueString = "<NULL_PTR>";
    }

    return valueString ;
  }

  /**
   * Get a string representation of this attribute. The radix for the
   * presentation of the value can be specified; e.g. 16 for hex, 10 for
   * decimal.
   *
   * @param radix The radix for the representation of the value.
   * @return A string representation of the value of this attribute.
   * @preconditions
   * @postconditions (result <> null)
   */
  public String toString(int radix) {
    StringBuffer buffer = new StringBuffer(32);

    if (present_) {
      if (sensitive_) {
        buffer.append("<Value is sensitive>");
      } else {
        buffer.append(getValueString(radix));
      }
    } else {
      buffer.append("<Attribute not present>");
    }

    return buffer.toString() ;
  }

}